hvx 200 remote lens control

[Lance The tech]

The focus/iris remote comes out on a 4-pole/3.5mm plug.
D is the ring and A,B,C are the contacts inwards to the tip.
The voltage on B is the Focus – 0V is near and 2V is far.
When D is open the cam is auto-iris, when D is GND the cam is
manual-iris.
The voltage on C is the iris -0V is open and 2V is closed.

The zoom/s.s is a 3-pole jack.
C is the ring and A the tip.
Every time A is grounded recording starts or stops.
B is the zoom voltage also between 0V and 2V giving a variable
zoom speed.
C is connected to the ground in the camera

Hope this can help you. I am not aware of any commercial kit
that can operate at that distance this camera. The best for short control are Bebop from Germany.

[Accountneedsrealnameupdate]

More specifically, on the 4-pole focus/iris connector, if you call the tip A and the back sleeve D, then ring C is your reference. A 20k pot between C and A adjusts iris, a 20k pot between C and B adjust focus, and a switch between C and D toggles auto/manual iris.

On the 3-pole zoom/ss, if you call the tip A and the back sleeve C, then the C sleeve is the reference. A momentary switch between C and A will act as the Start/Stop button, and a 20k pot between C and B will control the zoom. Note that the ‘center’ position of the zoom pot, (10k setting), is the ‘do nothing’ position. Moving the pot one way will zoom in and the other will zoom out, (I forget which is which), but changing the value of the pot a little will slowly zoom, and changing it a lot will zoom more quickly.

Now for the short answer to your question. Buy a varizoom controller, build or buy some extensions, and hope for the best. Or call varizoom and see how far they think you can get away with. It’s just a few analog voltages, so I think you could probably get it to work if you use one 300′ run of quality wire, (no connectors ever 25′).

Best of luck.

[Eric Ranzenhofer]

thank you for your info
log or linear pots

[Accountneedsrealnameupdate]

All three are Linear

[Adam Fuller]

So I have the varizoom rock pzfi, which uses the connections you mentioned. I’m trying to use it with a homemade focus follow system.

I simply need to tap into the correct leads off the line for the focus pot. C B D, is what I’m thinking leads to the focus pot, but it’s not working correctly. Is there something about how the remote is wired that will not allow me to gain access to one pot from three wires off the 4-pole plug?